Modifying combined hemisphere-cylinder shaped-charge liners to expand the range of velocity of the obtained compact elements

The currently used shaped charges with combined hemisphere-cylinder liners allows obtaining compact steel elements with velocities of about 6 km/s. In this work, the possibility of modifying hemisphere-cylinder liners to expand the velocity range of the resulting compact elements was investigated by numerical simulation within the framework of the two-dimensional axisymmetric problem of solid mechanics. The simulation was carried out for a 100 mm diameter shaped-charge charge with a copper liner. The jet-forming part of the liner had a degressive (decreasing from top to bottom) thickness, a hemispherical or semi-ellipsoidal shape outer surface, and a semi-ellipsoidal or semi-superellipsoidal inner surface. As a result of the calculations, the geometric parameters of combined liners to form compact elements of maximally possible mass with velocities of 5–9.5 km/s were selected. For an element with a velocity of about 9.5 km/s, the mass was about 5g.